Lake Ilsanjo Weather Forecast

    • 48
    • 53

    Areas Fog

    • 54
    • 60

    Rain

    • 46
    • 60

    Chance Rain

    • 50
    • 57

    Rain Likely

    • 49
    • 55

    Rain

    • 45
    • 56

    Rain Likely

    • 47
    • 53

    Rain Likely

Today 15 Dec North Bay Interior Valleys

Mostly cloudy. Patchy dense fog. Highs in the upper 40s to lower 60s. South Winds 5 to 10 Mph.

Tonight 15 Dec North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Patchy dense fog. A slight chance of rain after midnight. Lows in the 40s to mid 50s. West Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Ilsanjo Temperature Statistics

December Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (11.2 miles)

  • Lowest 4 December, 2025

    34 °F

  • Average December

    44.1 °F

  • Highest 3 December, 2025

    68 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (11.2 miles)

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    57.9 °F

  • Average High 2020–2025

    72.5 °F
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